John bean



2 Sheets-Sheet 1. J. BEAN.

PUMP

(No Model.)

Patented Nov. 5, 1889 2 Sheets-Sheet 2. J. BEAN.

PUMP

{No Model.)

Patented Nov. 5; 1889.

- n nuns. MQUQWWWLEC.

UNITED STATES PATENT FFICE.

J OHN BEAN, OF LOS GATOS, CALIFORNIA.

SPECIFICATION forming part of Letters Patent No. 414,667, dated November5, 1889.

Application filed June 6, 1889, Serial No. 313,376. (No model.)

To aZZ 1072,0722 it may concern:

Be it known that 1, JOHN BEAN, of Los Gatos, Santa Clara county, Stateof California, have invented an Improvement in Pumps; and-I herebydeclare the following to be a full, clear, and exact description of thesame.

My invention relates to the class of pumps; and my invention consists ina novel improvement in the plunger, a novel improvement in the bottom orcheck valve, and a novel improvement in the outlet from the cylinder andthe plunger in connection there with, all of which I shall hereinafterfully describe.

The several objects of these improvements will be fully set forth in thefollowing description.

Referring to the accompanying drawings for a more complete explanationof my invent-ion, Figure 1 is a perspective view of my pump. Fig. avertical section of cylinder, plunger, base, and bottom valve. Fig. 3 isa larger section of cylinder and plunger. Fig. 4 is a larger section ofbottom valve.

A designates any suitable receptacle for the liquid to be pumped. It ishere shown as a tub or vessel usually employed as the receptacle forspraying liquor for the treatment of trees, shrubs, &c. I

B is the pump-cylinder, mounted upon and bolted to a base casting orplate C, from which extends the suction-pipe D down into the liquid inthe tub.

E is the pivotal bracket or support for the pump-handle F, to which isconnected the plungerrod G.

H is the outlet-pipe communicating with the cylinder B near its base,and 72, is a checkvalve in said pipe. I is an air-cylinder communicatingwith said pipe.

J is an air-inlet or feed-pipe, the upper end of which is controlled bya small petcock j. This pipe extends downwardly into the tub A andcommunicates .with the suction-pipe D at a point below the level of theliquid in said tub. This pipe forms an air-inlet to the suction-pipewhen the petcock is open and a vacuum-chamber to the suction-pipe whenclosed.

This is the general organization of my pump. The plunger is constructedas follows: The lower end of the plunger-rod G is threaded, and uponthis is first seated a jamnut g, then a bell-shaped clamping orcompressing nut g, then a holding-nut g then the packing-washer g andthen the bearingnut gt The holding-nut g has a diameter small enough toallow the mouth of the bellshaped clamping-nut g to fit freely over it,so that its edge projects beyond or below it and into contact. withthepacking-washer g which it presses upon near its rim or periphery, thebase of said nut having a diameter but slightly smaller than that of thepacking- Washer. The bearing-nut g ha'sa conical or tapering top, theblunted apex of which is considerably less in diameter than thepacking-washer, being about the same diameter as the holding-nut. Thepacking-washer is confined between the holding-nut g and the bearing-nutg, and it project-s beyond both nuts. This washer, while it may be madeof any suitable flexible material, is preferably made of rubber-coveredduck. Its diameter, when flat, should be slightlygreater than theinterior diameter of the cylinder B. Now, in operation, itis firstconfined between nuts 9 and g and then the clamping or compressing nut gis turned down, so that its base-rim bears upon the washer near itsedge. Further movement of the nut g bends downwardly the projecting orunsupported edge of the washer over the top of the bearing-nut g therebysuiiiciently reducing its diameter to permit it to be inserted in thecylinder B. This insertion is a complete and clean one, requiring notamping or poking, as the Washer is compressed enough by the nut g toallow it to enter the cylinder easily. Now, when once in the cylinder,the rod G is drawn up sufficiently to expose above the cylinders top thetop of the compressing-nut g, the packing-washer being still fully inthe cylinder. Then the nut g is turned to run up slightly, therebypartially relieving the washer of its comp ressin g force, and saidwasher thereupon expands again and completely and perfectly fills thecylinder, making a properly-tight plunger. Then the jam-nut g is rundown and all the parts are held firmly in position. Now, when thispacking-washer gets worn and needs enlar in this nut is run farther upto let the packing expand farther. One or more of these packing-washersmay be used, as desired, at the same time. I have found it best toemploy the rubber-covered duck for the washer, as it has considerableelasticity and will expand perfectly when relieved, and I have furtherfound that when using the pump as a sprayingpump the liquor will notaffect the. rubber or (luck, thereby rendering thismat-erial welladapted for the purpose. I prefer, however, to remove the upper rubberor layer covering the top of the washer, as it. is inclined to stick inthe cylinder. The remaining or lower layer of rubber gives the washersufficient elasticity to expand, as above described.

The lower or check valve of the pump is thus constructed: In the annularseat of the bottom plate or casting is dropped a metal disk 0, having acentral hole bounded by a downwardly-beveled rim 0. Upon this disk islaid a flexible washer 0 made, preferably, of rubber-covered duck andhaving a central hole of a diameter about equal to that of the hole inthe disk. Then upon this is laid the valve-plate 0 theflexibly-connected flap c of which has attached to its upper side themetal disk 0 of equal diameter with the flap, and having adownwardly-beveled rim on its under side. The valve-plate and its flapare preferably made of rubber-covered duck. Now it will be seen that theedges or outer portions of both the washer c and the flap a lie in theplanes of the beveled surfaces of the disks 0 and c and under pressureyield on said surfaces, so that under the alternate pressure and itsrelief the flap and washer have a slight movement or work on each other,thereby freeing themselves of intervening sand, which is the object ofthis construction.

It is advisable in pumps to provide for the introduction and pumping ofsome air with the water. This is especially so with spraying-pumps,where theair is required to atomize or vaporize the spraying liquid. Iaccomplish this by admitting the air to the suctionpipe at a point belowthe level or surface of the liquid being pumped, as by thus admitting itit readily enters the pipe and joins the liquid.- This is effectedthrough the airpipe J heretofore described. A second function of theair-pipe J is that when the petcockj is closed it forms a vacuum-chamberfor the suction pipe. Now this air rises through theliquid and collectsabove its surface and between it and the base of the plunger, and unlessit be forced completely out at each stroke it soon increases in volumeand prevents the operation of the pump. This increase is due to the factthat between the cy-linders exitand the check-valve in the exitpipethere is always a space, from which the plunger cannot ordinarily forcethe air; consequently as the plunger rises the airsimply comes back intothe cylinder and gets above the water again. air out at each stroke bythe following construction: I raise the exit-communication of thecylinder with pipe H sufiiciently above -I avoid this and force the thebottom check-valve to provide for a small space or chamber between itslevel and that of said valve. I connect or form with the base of theplunger a displacement extension, which is here shown as the bearing-nutg heretofore described, thelower portion of said nut serving thispurpose and being made of very nearly the diameter of the cylinder. Now,in operation, as the plunger descends, driving the water before it, theair on the top of the water is forced down, and when the plunger properreaches the level of the exitopening the air has been forced throughsaid opening into pipe II; but the displacement extension of theplunger, having passed the exit-opening and filled the chamber betweenit and the bottom check-valve, has displaced the water in the chamberand forced it after the air into pipe II, so that said air is forcedbeyond the check-valve in said pipe. Then when the plunger rises nothingbut a little water returns into the cylinder.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is.-

1. In a pump, and in combination with the plunger-rod having a threadedlower end, the plunger consisting of the flexible packingwasher fittedon the rod, the holding-nut and the bearing-nut screwed on said rodabove and below the washer and having a diameter less than the washer,and the clamping or compressing nut screwed upon the rod above theholding-nut, and having its base bearing on the washer on a circle ofgreater diameter than the diameters of said holding and bearing nuts,substantially as described.

2. In a pump, and in combination with the plunger-rod having a threadedlower end, the plunger consisting of the flexible packingwasher fittedon the rod, the holding-nut and the bearing-nut screwed upon said rodabove and below the washer and having a diameter less than the washer,the bell-shaped clamping or compressing nut screwed on the rod above theholding-nut and bearing with its base on the washer on a circle ofgreater diameter than the diameters of the holding and bearing nuts, andthe jam-nut screwed on the rod above the clamping or compressing nut,substantially as described.

3. In a pump, the check-valve consisting of the bottom disk having acentral hole bounded by a beveled rim, the flexible washer resting onsaid disk and having a central hole the rim of which lies above thebeveled rim of the disk-hole, and the flexible flap of the valve-,plate, substantially as described.

inder, the bottom check-valve level with its base, an exit from saidcylinder at a point above said valve, so as to leave'a flat-bottomedchamber between its level and that of the valve, and a plunger in thecylinder having on its under side a displacement extension adapted topass the exit and enter and fill the chamber below it, substantially asdescribed.

6. In a pump, the cylinder and the bottom check-valve, an' exit-pipefrom said cylinder at a point above said valve, so as to leave a chamberbetween its level and that of the valve, and a check-valve in said pipe,in combination with a plunger in the cylinder consisting of the flexiblepacking-Washer, the

clamping or compressing nut and the bearing-nut, said last-named nuthaving a displacement extension adapted to pass the exit pipe and enterand fill the chamber below its level, substantially as described.

In Witness whereof I have hereunto set my hand.

JOHN BEAN. \Vitnesses:

TESLEY PEoK, B. H. NOBLE.

